<template>
  <div class="upload-file">
    <el-upload
      multiple
      :action="uploadFileUrl"
      :before-upload="handleBeforeUpload"
      :file-list="fileList"
      :limit="limit"
      :on-change="handleChange"
      :on-error="handleUploadError"
      :on-exceed="handleExceed"
      :on-success="handleUploadSuccess"
      :show-file-list="false"
      :headers="headers"
      class="upload-file-uploader"
      ref="upload"
      :auto-upload="true"
      style="display: inline-block"
      :disabled="disabled"
      :fileType="fileType"
    >
      <!-- 上传按钮 -->
      <el-button type="primary" :disabled="disabled">选取文件</el-button>
      <!--<el-button style="margin-left: 10px;" size="small" type="success" @click="submitUpload">上传到服务器</el-button>-->
    </el-upload>
    <!--<el-button style="display: inline-block;float: right;" type="success" @click="submitUpload">上传到服务器</el-button>-->
    <!-- 上传提示 -->
    <div class="el-upload__tip" v-if="showTip">
      请上传
      <template v-if="fileSize"> 大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b> </template>
      <template v-if="fileType"> 格式为 <b style="color: #f56c6c">{{ fileType.join("/") }}</b> </template>
      的文件
    </div>
    <!-- 文件列表 -->
    <transition-group class="upload-file-list el-upload-list el-upload-list--text" name="el-fade-in-linear" tag="ul">
      <li :key="file.uid" class="el-upload-list__item ele-upload-list__item-content" v-for="(file, index) in fileList">
        <!--<el-link :href="`${baseUrl}${file.attachPath}`" :underline="false" target="_blank">-->
    		<el-link @click="handleDownload(file)" :underline="false" target="_blank">
          <span class="el-icon-document">&nbsp;&nbsp;{{ getFileName(file.name) }} </span>
        </el-link>
        <div class="ele-upload-list__item-content-action">
          <el-link :underline="false" @click="handleDelete(index,file)" type="danger" :disabled="disabled">删除</el-link>
        </div>
      </li>
    </transition-group>
  </div>
</template>

<script setup>
import { getToken } from "@/utils/auth";
import { upLoadFile, downLoadFile, deleteFile } from "@/api/system/attachFile";

const props = defineProps({
  modelValue: [String, Object, Array],
  // 数量限制
  limit: {
    type: Number,
    default: 5,
  },
  // 大小限制(MB)
  fileSize: {
    type: Number,
    default: 100,
  },
  // 文件类型, 例如['png', 'jpg', 'jpeg']
  fileType: {
    type: Array,
    //default: () => ["doc", "xls", "ppt", "txt", "pdf"],
    default: () => [],
  },
  // 是否显示提示
  isShowTip: {
    type: Boolean,
    default: true
  },
  disabled: {
	  type: Boolean,
	  default: false
	},
});

const { proxy } = getCurrentInstance();
const emit = defineEmits();
const number = ref(0);
const uploadList = ref([]);
const baseUrl = import.meta.env.VITE_APP_BASE_API;
const uploadFileUrl = ref(import.meta.env.VITE_APP_BASE_API + "/attachment/uploadFile"); // 上传的图片服务器地址
const headers = ref({ token: "token " + getToken() });
const fileList = ref([]);
const showTip = computed(
  () => props.isShowTip && (props.fileType || props.fileSize)
);

watch(() => props.modelValue, val => {
	// debugger
  if (val) {
  	
    let temp = 1;
    // 首先将值转为数组
    const list = Array.isArray(val) ? val : props.modelValue.split(',');
    // 然后将数组转为对象数组
    fileList.value = list.map(item => {
      if (typeof item === "string") {
        item = { name: item, url: item };
      }
      item.uid = item.attachId || new Date().getTime() + temp++;
      item.name = item.attachName;
      item.url = item.attachPath;
      return item;
    });    
  } else {
    fileList.value = [];
    return [];
  }
},{ deep: true, immediate: true });

// 上传前校检格式和大小
function handleBeforeUpload(file) {
  // 校检文件类型
  if (props.fileType.length) {
    let fileExtension = "";
    if (file.name.lastIndexOf(".") > -1) {
      fileExtension = file.name.slice(file.name.lastIndexOf(".") + 1);
    }
    console.log(fileExtension,'=======');
    const isTypeOk = props.fileType.some((type) => {
      // if (file.type.indexOf(type) > -1) return true;
      if (fileExtension && fileExtension.indexOf(type) > -1) return true;
      return false;
    });
    if (!isTypeOk) {
      proxy.$modal.msgError(`文件格式不正确, 请上传${props.fileType.join("/")}格式文件!`);
      return false;
    }
  }
  // 校检文件大小
  if (props.fileSize) {
    const isLt = file.size / 1024 / 1024 < props.fileSize;
    if (!isLt) {
      proxy.$modal.msgError(`上传文件大小不能超过 ${props.fileSize} MB!`);
      return false;
    }
  }
  proxy.$modal.loading("正在上传文件，请稍候...");
  number.value++;
  return true;
}


function handleChange(file, fileList) {
	// console.log('333',file)
	// console.log('eee',fileList)
	fileList.value = fileList;
}

// 文件个数超出
function handleExceed() {
  proxy.$modal.msgError(`上传文件数量不能超过 ${props.limit} 个!`);
}

// 上传失败
function handleUploadError(err) {
  proxy.$modal.msgError("上传文件失败");
}

// 上传成功回调
function handleUploadSuccess(res, file) {
	//console.log(res,file)
	uploadList.value.push({ attachId: res.data[0].attachId, name: res.data[0].attachName, url: res.data[0].attachPath });
	// console.log('res', res)
  // console.log(JSON.parse(JSON.stringify(fileList.value)))
	if (uploadList.value.length === number.value) {
	    fileList.value = fileList.value.filter(f => f.url !== undefined).concat(uploadList.value);
	    uploadList.value = [];
	    number.value = 0;
	    //emit("update:modelValue", listToString(fileList.value));
	    proxy.$modal.closeLoading();
	    proxy.$modal.msgSuccess("上传文件成功");
      emit('uploadFile',res.data[0].attachId, file);
	}
}

// 删除文件
function handleDelete(index,file) {
  fileList.value.splice(index, 1);
  emit('delFile','');
  //emit("update:modelValue", listToString(fileList.value));
  // deleteFile(file.attachId).then(res => {
	// 	    //console.log(res)
  // 	if (res.code==200) {
  //       proxy.$modal.msgSuccess("删除文件成功");
        

  //   }else{
  //       proxy.$modal.msgError("删除文件失败");
        
  //   }
	// });
}

// 下载文件
function handleDownload(file) {
	var query = {
		attachId:file.attachId,
		name:file.attachName
	}
//	downLoadFile(query).then(response => {
//	    console.log(response)
//	});
	location.href = import.meta.env.VITE_APP_BASE_API + "/attachment/downLoadFile?attachId="+ encodeURIComponent(query.attachId);
//	var xhr = new XMLHttpRequest();
//	xhr.open('GET', url, true);    // 也可以使用POST方式，根据接口
//	xhr.responseType = "blob";  // 返回类型blob
//	// 定义请求完成的处理函数，请求前也可以增加加载框/禁用下载按钮逻辑
//	xhr.onload = function () {
//  // 请求完成
//  if (this.status === 200) {
//    	// 返回200
//    	var blob = this.response;
//    	var str = this.getResponseHeader("Content-Disposition");
//    	var index = str.lastIndexOf("=");
//				str =str.substring(index+1,str.length);
//    	var reader = new FileReader();
//    	reader.readAsDataURL(blob);  // 转换为base64，可以直接放入a标签href
//    	reader.onload = function (e) {
//      	// 转换完成，创建一个a标签用于下载
//      	var a = document.createElement('a');
//      	
//      	a.download = decodeURI(str);
//      	a.href = e.target.result;
//      	$("body").append(a);  // 修复firefox中无法触发click
//      	a.click();
//      	$(a).remove();
////				        	that.$message({
////				              type: "success",
////				              message: "导出成功!",
////				            });
//    	}
//  }else{
//  	proxy.$modal.msgError("下载文件失败");
//  }
//	};
//	// 发送ajax请求
//	xhr.send()
}

// 获取文件名称
function getFileName(name) {
	//console.log(name)
	return name
//if (name.lastIndexOf("/") > -1) {
//  return name.slice(name.lastIndexOf("/") + 1);
//} else {
//  return "";
//}
}

// 对象转成指定字符串分隔
function listToString(list, separator) {
  let strs = "";
  separator = separator || ",";
  for (let i in list) {
    if(undefined !== list[i].url) {
      strs += list[i].url + separator;
    }
  }
  return strs != '' ? strs.substr(0, strs.length - 1) : '';
}

//上传附件
function submitUpload(id) {
	console.log("232232")
		if (fileList.value.length === 0) {
      proxy.$modal.msgWarning("请选取文件");
      return
    }
    const formData = new FormData()
    // 因为要传一个文件数组过去，所以要循环append
    fileList.value.forEach((file) => {
    	console.log(JSON.stringify(file))
        formData.append('file', file.raw)
    })
//  for(var i = 0; i<fileList.value.length;i++) {
//		   formData.append('file',fileList.value[i])
//	 	}
    //formData.append('id', id) // 自定义参数
//  console.log(JSON.parse(JSON.stringify(formData)))
		upLoadFile(formData).then(res => {
		    console.log(res)
      	if (res.code==200) {
            proxy.$modal.msgSuccess("上传文件成功");
            //this.fileList = [];
            console.log(fileList.value)

        }else{
            proxy.$modal.msgError("上传文件失败");
            
        }
		});
//  proxy.$axios({
//  	headers:{
//  		contentType:'multipart/form-data'
//  	},
//      method: "post",
//      url: uploadFileUrl,
//      data: formData,                          
//  	}).then((res) => {
//      console.log(res);
//      if (res.code==200) {
//          proxy.$modal.msgSuccess("上传文件成功");
//          //this.fileList = [];
//          this.$parent.$parent.fatherMethod();
//      }else{
//          proxy.$modal.msgError("上传文件失败");
//          
//      }
//  });
    //this.$refs.upload.submit();
    
}
defineExpose({
  fileList
});
</script>

<style scoped lang="scss">
.upload-file{
	width: 100%;
}
.upload-file-uploader {
  margin-bottom: 5px;
}
.upload-file-list .el-upload-list__item {
  border: 1px solid #e4e7ed;
  line-height: 2;
  margin-bottom: 10px;
  position: relative;
}
.upload-file-list .ele-upload-list__item-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: inherit;
}
.ele-upload-list__item-content-action .el-link {
  margin-right: 10px;
}
</style>
